Swimming costume



FIG. 1 is a rear view of a swimming costume showing the new design;

FIG. 2 is a front view thereof; and,

FIG. 3 is a right side view thereof.

The broken lines showing of the human form are for illustrative purposes only and form no part of the claimed design.

The solid black surface shading in the drawings represents color contrast and not the color black. 

The ornamental design for a swimming costume, as shown and described. 